Workaround with nvidia driver nvidia-current-updates >= 304.43-0ubuntu0.1:
Background: The nvidia driver is not able to get the EDID of the display over the long VGA cable ((WW) NVIDIA(GPU-0): Unable to read EDID for display device DFP-2), and defaults to 'EDID for NVIDIA', which allows 640x480 only. I will use 'DP-1' for the display on the long VGA cable. Solution: Force more modes than the default EDID allows by ignoring and overriding its values. * Have in xorg.conf: Section "Device" [...] Option "ModeValidation" "DP-1: AllowNon60HzDFPModes, NoEdidMaxPClkCheck, NoDFPNativeResolutionCheck, AllowNonEdidModes" Option "HorizSync" "DP-1: 27.0-91.0" Option "VertRefresh" "DP-1: 59-61" #Option "ModeDebug" "True" EndSection Modes now should be selectable with nvidia-settings. If you need additional modes, define their 'Modeline's in the active Monitor section. Valid modes will be selectable for DP-1. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1098907 Title: nouveau kernel driver fails to detect display attached via long VGA cable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1098907/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
